Timing device for loom stop-motions



March 14, 1933. E C, sMlTH vTIMING DEVICE FOR LOOM STOP MoTIoNs FiledDec'.

2, 1931 2 Sheets-Sheet l IL LINGiwhnuflll:lll:Iilllllllwfmy l J1 U9 o n#ul/I I- L T* f WQ HHHIIHINMHNUIHHUD 4M March 14, 1933. E. c. SMITH1,901,418

TIMING DEVICE FOR LOOM STOP MOTIONS Filed Deaf?, 1931 2 Sheets-Sheet 2Patented Mar. 14, 1933 UNITED STATES PATENT OFFICE IAINE ISLAND,.ASSIGNOB TO RHODE ISLAND PORTLAND, MAINE, A CORPORATION Ol" TIHINGDEVICE FOR LOOM STOP-MOTIONS Application led December 2, 1931. SerialNo. 578,491.

weaving of a fabric, and where it is desired to defer stopping of theloom or fabricating machine until the action of such machine has reacheda certain point in its cycle or operation, or has reached acertain pointo in one of a series of cycles.

In the accompanying drawings, the' various views represent respectively:

Fig. 1, a side view elevationof so much of a loom as is necessary toshow the relation of my invention thereto and its manner of action;

Fig. 2, a plan view of so much of the loom startingand stopping-devicesas is necessary to show the operation of the stopswitch;

Fig. 3, a side elevation of my timer with he cover removed and lookingin the direction of the arrow a, Fig. 5, and showing the timer inactive;

Fig. 4, the same as the timer acting;

Fig. 5, a part sectional elevation on the line 5-5 of Fig. 4; y

Fig. 6, an alternative construction of the ratchet assembly;

Fig. 7, an elevation, partly sectional on the line 7-7 of Fig. 6; and

Fig. 8 is a perspective view of the spindle.

Like characters refer` to like parts, throughout the drawings and thespecification. v

Referring to Fig. 1, my timer-device 2 is shown applied to one type ofloom, near Fig. 3 but showing 'the foot 3 thereof. The timer 2 has adagger 4 which extends backward toward the loom picker-stick 5 which, inturn, is

mounted on the rocker 6. A bunter 7 is also mounted on the rocker 6 andis moved thereby toward and from the timer 2 with movement of the rocker6, the picker-stick 5 and thelay 8, all of which are moved together bywell-known means. The relation of the timer 2 to the bunter 7 is suchthat the timer-dagger 4 is normally held just is heavier than the abovethe top of the bunter 7 as the latter is l moved back and forth.

The timer 2 is included in, and is a part of, an electric circuitderiving its current from a source of electrical energy 9. e-I

sides the timer 2 the circuit includes a cir.- cuit-controlling switch10, a feeler 11, and a stop-magnet 12.

The positive side of the circuit P runs from the source of energy 9 tothe switch 10. From the switch 10, the positive side P of the circuitbranches, one branch P extending to and connecting with the magnet 12and the other branch P2 extending t0 the timer 2. The negative side o'fthe circuit N is grounded at a convenient point 13 in the loom side v3.The feeler 11 is connected with the timer 2 by the positive circuit wireP3. The feeler 11 closes the circuit by connecting this positive wire P3with the loom side which is the common ground.

Referring to ger 4 is mounted on a slide 14 in a casing 15. It can swingfreely in a vertical plane on a pin 16. The portion 17 of thefeelerdagger which projects from the casing 15 ortion 18 which is withinthe casing 15. nrestrained, the heavier ortion 17 would drop andencounter the bunter 7 as the lattermoves back and forth. Thefeeler-dagger 4 is restrained from so dropping by the plunger 19 of asolenoid 20 mounted within the casing 15. One lead 21 of the solenoidwinding extends to a ter- Figs. 3` and 4, the feeler-dagc minal plate 22mounted on an insulating v block 23. A screw 24 extending through theback of the casing 15 serves to connect the solenoid with the branchcircuit wire P and through the wire P3 with the feeler 11.

The branch circuit wire P2 from the switch 10 is similarly connected bya screw 25 with a terminal-bracket 25 to which the other lead 27 of thesolenoid 20 is attached. To the terminal-plate 22A is also secured aspring-metal shunt-contact or terminal 28 which extends toward thesolenoid 20. The plunger 19 of the solenoid 20 carries at its bottom aplate 29 of non-magnetic metal on which is mounted a contact-pin 30.This contact-pin 30 is guided b the bracket 31 and extends upwardly withits upper end near the shunt-contact 28. When the plunger' 19 is raisedthe pin 30 encounters the shunt-contact and the solenoid circuit isclosed, the solenoid being maintained ener- 'gized and the circuitmaintained closed by `the magnetic pull. When the solenoid circuit isopened, as by operation of the switch l 1 0, the magnetic pull ceases,the plunger 19 .pawl pushed upwardly into dro and the shunt connectionis broken. en the timer-dagger 4 is released by raisi of the plunger 19,its weightier end 17 lfa into the ath of movement of the timer-bunter 7and) is movedthereby. With the feeler-dagger 4, moves a slide 14 towhich it is secured. Attached to the slide 14 is a bracket 32 having twosets of bearing-lugs 33 and 34. Between the lugs 33 is mounted adriver-pawl 35 on the Ein 36. Mounted on a similar in between t e lu 34is an angle or be -crank member 3 Through the vertical or endant armrofthe member 37 there is a. pin 38 slidably suprted thereby, the oppositeend of the pm ing similarly supported by the ndant arm of an angle-plate39. The ot er arm of the angle plate 39 constitutes one sup-y portingbearing for the slide 14, being secured to the casing 15 by screws 40.The oipposite or dagger-supportin end of the side 14 is supplorted by ap ate 41 which is secured to t e casing 15 by screws 42.

Surrounding the pin 38 is a s ring 43 which, under compression between te angleplate 39 and the pendant arm of the bellcrank member 37, servesto maintain the slide 14 and feeler-dagger 4 ressed toward thefeeler-bunter 7 and away rom the timerratchet wheel 44. In so doing, thehorizontal arm of the bell-crank member 37 is pressed upwardly. Slidablein a hole in the slide 14 between the driver-pawl 35 and the horizontalarm of the member 37 is a pin which and member 37 acts to maintain thedriversition to properly engage the teeth of t e ratchet wheel 44.

The ratchet wheel 44 is an element of what I term the timing unit. Itismounted on a spindle 46 which` consists preferably of a cylindricalbody, having opposed flats 47, 47; a threaded portion 48 and a reducedend or trunnion 49, see Fi 8. Mounted on the flattened portion 47 o thespindle 46 is the ratchet wheel 44 which is made from insulatingmaterial such as ber. The ratchet wheel 44 has a hub 50 with a shoulder51 Mounted on the hub 50 arid lying a ainst a shoulder 51 thereof is acontact-dis 52 having a numberV of peripheral lobes 61, less in numberthan the teeth of the ratchebwheel .44. Also mounted on the hub andlying against the contact-disk 52`is a cup-shaped distributor orcontact-ring 53. The contact-disk 52 and the contact-ring 53 aresecuredtogether and to the ber ratchet wheel 44 by rivets 54. A berwasher 55 separates the contact-ring 53 and conjoined contact-disk. 52from the end of a boss 56 of the casing 15 in which boss, the body ofthe spindle 46 has a bearing. The reduced bearing portion 49 of thespindle 46 has a bearing in the plate 57 which is secured by screws 58to the casing 15. A check-pawl 59 is also mounted on the plate 57 and isheld in engagement with the ber lratchet wheel 44 by a spring 60. Thelobes 61- of the contact-disk 52, overlap certain tooth spaces of theratchet wheel 44. When the driver-pawl 35 enters a tooth space of saidratchet wheel 44 across which tooth space one of they lobes 61 of thecontact-disk extends, said driver-pawl 35, in bottoming in said toothspace, encounters the lobe Y61 of the contact-disk 52. Such contactcompletes a continuous extent of metal, and consequently of electricalContact, from the contact-ring 53 to the loom side 3 to which' thetlmer-case is secured and which forms the common ground for all.branches of the electrical circuit. When 4the ber ratchet wheel hasturned one tooth, the driver-pawl 35 enters a tooth space, notoverlapped by a lobe 61 of the contact-disk 52'A and bottoms on the ber,the continuity of metallic connection just, described will be broken. Inthis instance the ber ratchet wheel 44 has twelve teeth and the metaldisk 52 is provided with four lobes 61. Consequently, metalliccontinuity occurs with every third impulse of the driving pawl 35.

Mounted on the insulating block 23 is a third terminal-plate 62 which,by means of a screw 63, is connected with "the branch circuit P4 whichextends to the shunt-lead of the magnet 12. The magnet is of a well-`known type having the s ame kind of shuntunder the action of the spring43 device as has the solenoid 20, so that once the magnet 12 has beenenergized it remains energized until ,the circuit has been opened orbroken by the switch 10. Mounted on the terminal-plate 62, just referredto, is a contact-spring or brush 64 which touches the periphery of thecup-shaped contact-ring 53.

The action of my timer may now be described. Upon near exhaustion offilling in the loom, the feeler 11 closes the feeler circuit bygrounding the branchcircuit Psi in the loom-frame 3. The loom being inoperation, the feeler-bunter 7 is oscillated toward and away from thetimer 2. They upper extremity of said bunter 7 passes under the end ofthe timer-dagger 4 when the latter is in its normal or raised position.On closing of the feeler-circuit, the solenoid 20 is energized and theresultant magnetic action raises the plunger 19, releasing the dagger 4so its heavier end 17 falls into position to encounter the feeler-bunter7 i on its next forward swing. The plunger 19 pulled up by the solenoid20 brings the end of the pin 30 into position to encounter theshunt-contact 28 and the magnetic pull thereupon maintains theencounter.

Impelled by the timer-bunter 7, the slide 14 which carries thetimer-dagger 4 is moved. The slide 14 under the action of thetimer-bunter 7 brings the driver-pawl 35 into engagement with the fiberratchet wheel 44 moving the latter one tooth. The checkpawl 59, fallingbehind a corresponding tooth of the ratchet wheel 44, holds the latterto the position to which it has been advanced. Each reciprocation of theslide 14 under impulse of the timer-bunter 7 causes the fiber ratchetwheel 44 to be advanced one tooth where it is held to the advancedposition b the lcheck-pawl 59. With the relation o the components oftheratchet wheel assembly as shown in the drawings, at every third toothspace the 'driverawl 35 bottoms in and encounters one o the lobes 61 ofthe contact-disk 52. In this manner the magnet circuit P* is groundedand closed so that the magnet 12 is energized.

The magnet 12 when energized raises the stop-dagger 66 through theconnections between said stop-dagger 66 and the armaturelever 67 of saidmagnet 12. As the lay 8 beats back, the bunter 68 carried by the layencounters the upheld dagger 66 and acting through the lever 69,knock-olf rod 70 and dog 71, shifts or rocks the starting-handle 72causing the loom to stop.- The handle 72 in shifting moves the .loomclutch-lever and acting on the switch 1() opensthe circuit.

The magnet 12 has the same shunt construction as described in connectionwith the solenoid 20. As this shunt-device is well known and is notclaimed as such,.no de scription is given of its details. By its action,thev magnet is maintained energized until the circuit is broken betweenthe magnet 12 and the source of energy 9.

The specilic purpose of my invention is to stop the loom with theexhausted'shuttle in a given box, namely, in the plain box of a 2 x 1box-loom. The feeler is usually mounted on the breast-beam at the plainor singlebox side of theloom. The feeling action' takes place on theforward stroke or beat of the loom, the stopping or knock-off actionusually occurring at or near the back stroke. The throw of the shuttleis initiated before the lay reaches V.the end of the back stroke.Consequently, should the feeler 11 effect a stopping of the loomimmediately u n detection of near exhaustion of the ii ling on a bobbin,without intervention of the timer, the loom would be stopped with theshuttle at the side of the loom usually designated the box-side, `andnot in the plain Aside as is desired. By my invention, the action of thefeeler 11 is to set the timer 2 into action. The timer 2 simply deersthe stoppinguntil the third pick after the feeling or detection occurs,which causes the nearly empt shuttle to be returned to the plain side othe loom when the latter stops.

Fig. 6 shows an alternative construction of the ratchet assembly. Inthis construction the fiber ratchet wheel 76 corresponds with the liberratchet 44 already described, certain tooth spaces 77 being cut deeperthan the other tooth s aces 78. The contact-disk 79 is a flat circu arlate with no lobes and of such a diameter t atthe periphery of the disklies radially within the bottoms of the shallow tooth spaces 78 butoverlaps the bottoms of the deeper tooth spaces 77. As the driver-pawl35 advances the ratchet wheel 76, the shallow tooth spaces prevent itfrom reaching and touching the contact-disk 79. When a deepl tooth spaceoccurs during the advance of t pawl 35 encounters the contact-member 79,connecting it metallically and electrically with the loom side which isthe common' ground of all the circuits as described. In this alternativeassembly the contact-ring is omitted, the brush or contact spring 64bearing on the side of the disk-shaped contactmember 79 withoutintervention of a ring.

Without limiting myself tothe precise form and arrangement of thedevice, I claim:

1. In a timing device for loom stop-motions, the combination with anelectro-.magnetic stop-device, and an electrical circuit therefor, of atiming unit in circuit `with e ratchet wheel 76, the driversaid stodevice, contact means incorporated with said timing unit for closing thecircuit and constituting one terminal thereof exposed at intervals byturning the timing unit a driving member constituting the other terminalof the electric circuit to turn the timing unit and at the statedintervals' encounter the exposed contact means to close the circuit, andmeans to impel the driving member. I

2. In a timing device for loom stop-motions, the combination with anelectro-magynetic stop-device and an electrical circuit therefor, oneside of which circuit terminates 1n a common ground, of a rotatableterminal for said circuit, means for exposing said roy tatable terminalduring some intervals of rotation and for-shielding it during otherinlao' tervals, a driver to advance the exposing and shielding means andto'make contact with the rotatable terminal when exposed, which driveris connected with the common ground andconstitutes the terminal of thegrounded side of the circuit, and means to actuate the driver to rotatethe rotating terminal and its exposing and shielding means, and at timesto contact with the rotatable terminal to close thecircuit.

3. The combination in a timin device for loom stop-motions with anelectrical circuit a driving-pawl constituting one terminal oi thecircuit and means to drive the pawl, of a ratchet wheel not included inthe circuit and driven by said pawl, and a rotating terminal lfor theother side of the circuit which rotating terminal is rotated by and withthe ratchet' wheel aforesaid when advanced by the pawl, the pawl makingcontact with the rotatin terminal at intervals in the rotation of sai Iratchet wheel toclose the circuit. a

4. The combination in a timing device for loom stop-motions with anelectrical circuit, a terminal for one side of the circuit whichterminal has a reciprocating movement and means to impart suchreciprocating movement to said terminal, of a terminal for the otherside of the circuit which y terminal is normally out of contact with thereciprocating terminal, and means o rated by said reciprocating terminalto periodicall permit contact o said terminals to close the circuit andat intervening times prevent such contact to maintain the circuit open.

5. In a timing device for electrical stopmotions, the combination withan electrical circuit' to be closed, a rotating timing unit andreciprocating means to rotate said unit to close and to open saidcircuit, of a continuously moving bunter, a dag er carried adjacent thepath of movement o the bunter by said reciprocating means, means torestrain said dagger -from engaging the bunter, a solenoid. to releasesaid restraining meansand permit the dagger to fall into engagement withthe bunter so the latter actuates the reciprocating means, an auxiliarycircuit to energize the solenoid, and means to close said auxiliarycircuit.

6. In a timing control for the timing device of a loom stop-motion,'thecombination with a stop-motion circuit, of a rotatable terminal for oneside of said circuit, a reciprocating terminal for the other side of thecircuit, a member that carries the rotatable terminal which member isengaged by'and advanced rotatively by said reciproeating terminal and atintervals in such rotative advance presents the surface of the rotatableterminal to the reciprocating terminal, and means to operatively movethe reciprocating terminal to turn the rotatable terminal and atintervals make contact therewith to close the stopfmotion circuit,

cable means, but normally restrained from such engagement,electro-magnetic control to restrain and to release said dagger, anauxiliary circuit for the electro-ma etic control, and means to closesaid auxiliary cir 1zuit to energize said electro-magnetic contro 8. Ina timing device for electrical stopmotions, the combination with thestop-motion magnet and circuit therefor, of a rotatable timing unit tointermittently close said circuit, a pawl movable to advance said unitrotatively, a slide to carry and reciprocate the pawl, a dagger carriedby the slide `and free to drop when unrestrained, an electro-magneticcontrol for the dagger, an auxiliary circuit for the control, means toclose said auxiliary circuit to release the dagger and permit it todrop, a reciprocating bunter to encounter the dropped dagger and throughit communicate the reci rocatin movement of the bunter to the side, anmeans to reciprocate said bunter.

9. In a timing device for loom stop-motions, the combination with anelectro-ma netic stop-device and an electric circuit therefor, of atiming unit in circuit with said stop-device, contact meansincorporatedwith said timing unit for closing said stopmotion circuit, anotherelectro-magnetic device to cause the tiinin unit Jvto act, and meansintermediate said evice and said unit to secure such action.V

10. In an electrical stop system for looms, the combination with thestopping apparatus of a loom, of an electro-magnetic device foractuating the stopping apparatus of the loom, means to operativelyconnect said ap aratus and device a feeler for initiating t e action ofsaid electro-m etic stoppin device, electric circuits for said device anfeler, a common source of electric current to serve said circuits, atiming unit operative from the loom action to close the, eectro-magneticstopping circuit at la of a definite interval after thefeeler action, a second electro-magnetic device in the feeler circuit tocontrol the timer unit-from the feeler, and means controlled by thesecond electro-magnetic device for transmitting the loom action to thetimer unit. n f

In testimony whereof I hereunto ailix my signature.

EDWIN C. SMITH.

7. In a timing device for electrical stop motions, .the combination withthe stop-motion magnet and circuit therefor of a rotatable timing unitto intermittently close said circuit, reciprocable means Ato rotate saidtiming unit, a bunter reciprocating adjacent said reciprocable means, adagger engageable with said bunter to communicate reciprocation of 'thebunter to the recipro-

